CN106025560A - EBG structure based low profile ultra-wideband circularly polarized antenna - Google Patents
EBG structure based low profile ultra-wideband circularly polarized antenna Download PDFInfo
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- CN106025560A CN106025560A CN201610536573.5A CN201610536573A CN106025560A CN 106025560 A CN106025560 A CN 106025560A CN 201610536573 A CN201610536573 A CN 201610536573A CN 106025560 A CN106025560 A CN 106025560A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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Abstract
The invention provides an EBG structure based low profile ultra-wideband circularly polarized antenna to solve the technical problem of a relatively narrow operating frequency band seen in an existing EBG-based low-profile wideband circularly polarized antenna. The antenna comprises an EBG structure (1), a cross-dipole antenna (2) and a power division phase shifter (3). The feeding unit of the cross-dipole antenna (2) adopts an inverted L-type coupling feeding method, and the feeding unit is vertically inserted into the EBG structure. The power division phase shifter (3) comprises a Wilkinson power splitter and a 90-degree phase shifter; and the power division phase shifter (3) shares the same ground with the EBG structure (1) and is connected with the feed line of the feeding unit. The antenna of the invention has a low profile but a wide operating frequency band, and can be used for receiving and transmitting circularly polarized electromagnetic waves in radio frequency identification, radar and wireless communication in a wide frequency band.
Description
Technical field
The invention belongs to antenna technical field, relate to a kind of low section ultra broadband circular polarized antenna, be specifically related to one
Plant low section ultra broadband circular polarized antenna based on EBG structure, can be used for RF identification, radar and channel radio
Believe in the reception of broadband inner circle polarized electromagnetic wave and transmitting.
Background technology
Antenna can be divided into linear polarization, circular polarisation and elliptic polarization three kinds according to polarization characteristic, and its bandwidth refers to antenna
Specifeca tion speeification in the frequency range that can meet design objective requirement, such as input impedance, directional diagram, increasing
Benefit, main lobe width and minor level etc., generally, antenna performance parameters varies with frequency, because of
And the beamwidth of antenna is dependent on the frequency characteristic of various performance parameters.For circular polarized antenna, its polarization characteristic is past
Toward being the principal element limiting bandwidth of operation.
Circular polarized antenna can receive the line polarization wave of arbitrary polarisation direction, and the signal that it is launched simultaneously can also be by
The linear polarized antenna of arbitrary polarisation direction receives, and has rotation direction orthogonality, especially aerospace craft,
The radio art such as radio communication and the polarity diversity of radar, global location are used widely field.
In recent years, Ultra-wideband Communication Technology is paid close attention to widely, owing to it can be significantly increased communication speed
Rate and there is low in energy consumption, safety advantages of higher so that Ultra-wideband Communication Technology increasingly demonstrates that it is unique
Advantage.It is generally believed that absolute bandwidth is more than 0.5GHz (mid frequency is more than 2.5GHz) or relative bandwidth
It is ultra-wideband antenna more than the antenna of 20% (mid frequency is less than 2.5GHz).
Antenna in actual application depends on the carrier of metallic conductor or metalloid conductor, with freedom more
In space, the radiation characteristic of antenna is compared and is very different, and the antenna section of this type is close to operating frequency
Quarter-wave.In view of a series of factor such as mechanical problem, air dynamic behaviour in reality application,
The excessive antenna that is not easy to of the section of antenna is conformal with carrier, and adds the resistance that antenna is subject in moving process
Power.Therefore low profile antenna is low with its profile, windage is little, sound construction, lightweight and be easily achieved and carry
The characteristics such as body is conformal receive the extensive concern of antenna researcher.
In the design of low profile antenna, microstrip antenna is low because of its section, low cost, it is easy to manufactures and enjoys favor.
But, the conventional general impedance bandwidth of microstrip antenna narrower (less than 5%), sometimes can not meet some modern nothing
The bandwidth requirement of wire system.Researcher proposes many bandwidth enhancement technology, such as U-type groove paster both at home and abroad
Antenna, coplanar couple feed etc., although by using these technology, it is ensured that increase band while low section
Width, but be that typically in whole operating frequency range, these microstrip antennas have powerful back side radiant, impact
The performance of antenna.Along with Chinese scholars research increasing to new material, a kind of artificial electromagnetic band gap knot
Structure EBG is applied in the structure of low profile antenna.EBG structure (Electromagnetic band gap)
Being a kind of artificial periodic structure, have Surface wave bandgap characteristic and Photonic Band characteristic in the same direction, it has multiple
Type, is usually and is made up of metal and medium mixing.The characteristic of Photonic Band in the same direction of EBG structure can be used for setting
Meter low profile antenna.Traditional method uses metal floor as the reflector of antenna, and the method requires that antenna is from gold
The distance of possession plate is about the 1/4 of operating frequency of antenna wavelength, this is because electromagnetic wave incident is to after metal floor,
The phase place of reflection electromagnetic wave and former incident electromagnetic wave phase 180 °.When antenna distance floor 1/4 wavelength,
Phase place after floor reflection and former phase, the radiation efficiency of antenna is the highest.And the surface of EBG structure
The phase place that can make reflection electromagnetic wave increases from 180 ° to-180 ° changes with frequency, in certain frequency range internal reflection phase place
It is homophase with incident phase.According to this principle of EBG structure, low profile antenna can be designed, reduce
The height of antenna.
EBG structure is applied in low section ultra broadband circular polarized antenna, has scholar at present and it has been done one
A little researchs, such as Kush Agarwal, Nasimuddin and Arokiaswami Alphones was in 2013 years 3
Paper " the Wideband that the moon is delivered on IEEE Transactions On Antennas And Propagation
Circularly Polarized AMC Reflector Backed Aperture Antenna " in, using EBG structure as
The reflecting plate of the ultra broadband circular polarisation aperture antenna of its design, the section height of antenna is reduced to 0.19 λ, sky
The impedance bandwidth of line is 36.2% (5.04GHz～7.21GHz), and axial ratio bandwidth is 33.2% (5.20GHz～7.19
GHz), in order to ensure wider frequency band, certain section height is sacrificed；And for example Wanchen Yang and
KamWeng Tam sent out on IEEE Transactions On Antennas And Propagation in 2014
Paper " the Novel Polarization Rotation Technique Based On An Artificial Magnetic of table
Conductor And Its Application In A Low-Profile Circular Polarization Antenna " middle general
Dipole antenna is combined with EBG structure, utilizes the phase characteristic of EBG structure reflected signal to achieve low section
Circular polarized antenna, in working frequency range 4.75GHz～5.65GHz, its section height has reached 0.05 λ, resistance
Anti-and axial ratio bandwidth is 17.3%, although antenna section height is relatively low, but its bandwidth relative narrower.
Summary of the invention
It is an object of the invention to the defect overcoming above-mentioned prior art to exist, propose a kind of based on EBG structure
Low section ultra broadband circular polarized antenna, for solve existing low section based on EBG structure broadband circle polarized
The technical problem of the working band relative narrower that antenna exists.
The technical thought of the present invention is: uses cross dipole antenna to realize circular polarisation, utilizes EBG structure
Photonic Band characteristic reduces antenna section height in the same direction, and divides the phase shifter to feed antenna hard.
According to above-mentioned technical thought, it is achieved the technical scheme that the object of the invention uses is:
A kind of low section ultra broadband circular polarized antenna based on EBG structure, including antenna element, described antenna
Unit uses cross dipole antenna 2, is used for widening frequency band, and this cross dipole antenna 2 side of being inserted under sets
In the EBG structure 1 put, being used for realizing low section, the lower section of described EBG structure 1 arranges meritorious point of phase shift
Device 3, is used for realizing circular polarisation, and the lower surface of described EBG structure 1 and merit divide the upper surface of phase shifter 3 to paste
Close.
Above-mentioned low section ultra broadband circular polarized antenna based on EBG structure, described EBG structure 1, including
One dielectric-slab 11, its upper surface is printed with n × n square or circular metal patch 12, and lower surface is printed with
Metal floor 13, is provided with cross crotch in the center of this EBG structure 1, is used for inserting crossed dipoles
Antenna 2.
Above-mentioned low section ultra broadband circular polarized antenna based on EBG structure, described cross dipole antenna 2,
Including radiating element 21 and feed element 22, described radiating element 21 includes four horizontal dipoles 211, described
Feed element 22 includes second medium plate 223 and the 3rd dielectric-slab 224, and these two dielectric-slabs 223,224 hang down
Orthogonal is pitched, and described four horizontal dipoles 211 are fixed on the upper end of two dielectric-slabs 223,224.
Above-mentioned low section ultra broadband circular polarized antenna based on EBG structure, described second medium plate 223, its
Lower edge center is provided with inverted U groove, and the one side of this second medium plate 223 is printed with the first feeder line
221, another side is printed with two rectangular metal sheet 225；Described 3rd dielectric-slab 224, its upper end-face edge center
Position is provided with U-type groove, and the one side of the 3rd dielectric-slab 224 is printed with the second feeder line 222, and another side is printed
There are two rectangular metal sheet 225；Described first feeder line the 221, second feeder line 222 and rectangular metal sheet 225,
Form inverted L shape structure respectively, be used for realizing couple feed；The inverted U groove of described second medium plate 223 and
The U-type groove of the 3rd dielectric-slab 224 is coincide.
Above-mentioned low section ultra broadband circular polarized antenna based on EBG structure, described horizontal dipole 211, use
Symmetrical structure, this horizontal dipole 211 is connected with metal floor 13 by rectangular metal sheet 225.
Above-mentioned low section ultra broadband circular polarized antenna based on EBG structure, described first feeder line 221 and second
Feeder line 222, all uses composite microband line structure, and this composite microband line structure is respectively D4 and D5 by width
Two sections of microstrip lines be formed by connecting, wherein, width is that the microstrip line of D5 is converted into inverted U, and D5 ＞ D4.
Above-mentioned low section ultra broadband circular polarized antenna based on EBG structure, described merit divides the phase shifter 3, including
4th dielectric-slab 31, its lower surface is printed with Wilkinson power divider 33 and 90 ° of phase shifters 32；This merit divides shifting
Phase device 3 is fitted with metal floor 13, forms ground structure altogether；Described 90 ° of phase shifters 32, its first outfan
Mouth 321 is connected with second feeder line 222 in the gap arranged on metal floor 13, the second output port 322
It is connected with first feeder line 221 in the gap arranged on metal floor 13.
The present invention compared with prior art, has the advantage that
1, due to the fact that in the EBG structure arranged the antenna element side of being inserted under, merit divides the phase shifter simultaneously
Fit with the metal floor of EBG structure, form ground structure altogether, it is achieved that low section, compared with prior art,
Effectively reduce antenna entirety section height.
2, due to the fact that antenna element uses cross dipole antenna, and this cross dipole antenna uses
L-type couple feed structure, compared with prior art, on the premise of ensureing the low section of antenna, effectively widens
The bandwidth of antenna.
Simulation result shows, antenna entirety section height is less than on the premise of 0.1 λ, and impedance bandwidth reaches
70.6%, axial ratio bandwidth has reached 65.8%, has taken into account low section and the ultra broadband characteristic of antenna.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention；
Fig. 2 is the top view of inventive embodiments；
Fig. 3 is the side view of EBG construction unit of the present invention；
Fig. 4 is the structural representation of cross dipole antenna in the present invention；
Fig. 5 is the structural representation of the second medium plate of cross dipole antenna in the present invention；
Fig. 6 is the structural representation of the 3rd dielectric-slab of cross dipole antenna in the present invention；
Fig. 7 is the structural representation that in the present invention, merit divides the phase shifter；
Fig. 8 is the structural representation of the power splitter that merit divides the phase shifter in the present invention；
Fig. 9 is the structural representation of 90 ° of phase shifters that merit divides the phase shifter in the present invention；
Figure 10 is the standing-wave ratio simulation result figure of the embodiment of the present invention；
Figure 11 is that the axle of the embodiment of the present invention is than simulation result figure.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment, the invention will be further described:
Reference Fig. 1, low section ultra broadband circular polarized antenna based on EBG structure, including: EBG structure 1,
Cross dipole antenna 2 and merit divide the phase shifter 3, for making antenna entirety section height minimum, and crossed dipoles
Antenna 2 inserts in EBG structure 1, and merit divides the phase shifter 3 to be positioned at EBG structure lower surface, with EBG structure
Altogether.Cross dipole antenna 2 is vertical with the upper surface of EBG structure 1, so that echo is with radiated wave just
To superposition, thus ensure antenna axle ratio characteristic in broadband.Merit divides the phase shifter 3 to export constant amplitude and phase contrast
The signal of 90 ° is so that antenna element radiates circularly polarised wave.Should low section ultra broadband entelechy based on EBG structure
The height that section height is cross dipole antenna 2 of change antenna and merit divide the height sum of phase shifter 3.
With reference to Fig. 2, the upper surface of described EBG structure 1 is printed with n × n square or circular metal patch
12, by changing the square length of side or the radius of circle, and the spacing of two metal patches, EBG can be regulated
The frequency range of the homophase Photonic Band of structure and bandwidth, the mid frequency of the homophase Photonic Band of EBG structure and sky
The mid frequency of line working band is identical or close；The present embodiment uses 6 × 6 square-shaped metal pasters, its
The length of side is 32.4mm, two adjacent metal patch centre distances M=40.4mm；Cross dipole antenna 2 is positioned at
EBG structure centre.
With reference to Fig. 3, first medium plate 11 lower surface of described EBG structure 1 prints metal floor 13, and this is the years old
One dielectric-slab 11 slotting in middle is so that cross dipole antenna 2 is inserted.By changing the material of first medium version 11
Material and thickness, can regulate frequency range and the bandwidth of the homophase Photonic Band of EBG structure；In the present embodiment, it is situated between
The thickness of matter layer 12 is 9.8mm, and for cost-effective, the material of employing is FR-4.
Reference Fig. 4, described cross dipole antenna 2, including radiating element 21 and feed element 22, described
Radiating element 21, including four horizontal dipoles 211, the centerline length of horizontal dipole 221 determines antenna
Working band, in the present embodiment, the size of horizontal dipole 211 is D1=1.63mm, D2=14.1mm,
D3=52mm；Feed element 22 includes second medium plate 223 and the 3rd dielectric-slab 224 of square crossing, should
The Effect of Materials of the two medium versions electrical loss of antenna, to regulate its thickness can be finely adjusted the standing-wave ratio of antenna；
In the present embodiment, this two dielectric-slab uses material to be FR-4, and thickness is 1.63mm.
Reference Fig. 5, described second medium plate 223, in the present embodiment, its length S2=39.1mm, highly
S1=18.4mm, for making itself and the 3rd medium version 224 constitute square crossing structure, at its lower edge centre bit
Install and be equipped with inverted U groove, width S 4=1.63mm of groove, degree of depth L6=13.6mm, this second medium plate 223
One side is printed with the first feeder line 221, and another side is printed with two rectangular metal sheet 225, the first feeder line 221 with
Rectangular metal sheet 225 constitutes L-type couple feed structure.In the first feeder line 221, by suitable tune
Save width and the length of two sections of microstrip lines in the first feeder line 221, standing-wave ratio and the axle ratio characteristic of antenna can be improved.
In the present embodiment, D5=1.3mm, D4=0.7mm, width is that the microstrip line vertical portion of D5 is perpendicular to gold
Possession plate 13, horizontal portions parallel is in the long limit of second medium plate 223, and width is that the microstrip line of D4 is vertically worn
Crossing metal floor 13, metal floor 13 cracks to avoid contacting with feeder line.The length of rectangular metal sheet 225 with
The height of second medium plate 223 is equal, width D 6=13mm.Its of second medium plate 223 in the present embodiment
Its relative dimensions is as follows: L1=6.4mm, L2=33.4mm, L3=23.5mm, L4=2.4mm, S3=0.8mm.
With reference to Fig. 6, length and the height of described 3rd dielectric-slab 224 are all equal with second medium plate 223,
Its upper end-face edge center is provided with U-type groove, this U-type groove can with in second medium version 223 lower edge
The inverted U groove that heart position is arranged coincide, so that second medium plate 223 and the 3rd dielectric-slab 224 pass through U
Type groove constitutes square crossing structure, and upper surface flush, and in the present embodiment, two U-type groove degree of depth sums are the
The height of second medium plate 223.The one side of the 3rd dielectric-slab 224 is printed with the second feeder line 222, and another side prints
Be shaped with two rectangular metal sheet 225, the printing position of two rectangular metal sheet 225 with it at second medium plate 223
The position of upper printing is identical.By the width of two sections of microstrip lines in suitable regulation the second feeder line 222 and length,
Also standing-wave ratio and the axle ratio characteristic of antenna, in the present embodiment, L5=30.9mm, the width of its microstrip line can be improved
Should be with the first feeder line 221 adjusted in concert.
With reference to Fig. 7, described merit is divided the phase shifter 3, be its role is to the signal that phase difference output is 90 °, make sky
Line unit radiation circularly polarised wave, the mid frequency of its working band (phase difference output is within 90 ° ± 5 °)
Identical or close with the mid frequency of antenna element working band.Described 4th dielectric-slab 31, Jie of its material
Electric constant is little on the impact of its working band, and for make the electrical loss of antenna reduce in the present embodiment, employing material is
Rogers 4350B, merit is divided the working band of phase shifter to have certain impact, its thickness in the present embodiment by its thickness
For 0.8mm, pass with 222 for convenience of two feeder lines 221, crack through position at feeder line.Described merit divides phase shift
Device 3 is connected with 90 ° of phase shifters 32 by Wilkinson power divider 33 and forms, in this merit divides the phase shifter 3, defeated
Inbound port 331 input signal, the first output port 321 is connected with the second feeder line 222, the second output port
322 are connected with the first feeder line 221.
With reference to Fig. 8, in described Wilkinson power divider 33, the signal of two output port output constant amplitude homophases.
In the present embodiment, isolation resistance R1=565 Ω, R2=63 Ω, its each section of dimension of microstrip line is as follows
D12=1.6mm, D13=1mm, D14=1.5mm, L12=25mm, L13=24mm.
With reference to Fig. 9, described 90 ° of phase shifters 32 are made up of the contrast circuit in left side and the phase-shift circuit on right side, prestige
After the signal of the constant amplitude homophase of Er Jinsen power splitter 33 output is respectively through contrast circuit and phase-shift circuit, output
Amplitude is equal, and phase contrast is the signal of 90 °.In the present embodiment, its each section of dimension of microstrip line is as follows:
D7=1.6mm, L7=116mm, D8=1.6mm, L8=17mm, D9=2.8mm, L9=25.2mm,
D10=1.1mm, L10=27.3mm, D11=5mm, L11=25.5mm.
The effect of the present invention can be described further in conjunction with simulation result:
1, emulation content
1.1 utilize business simulation software HFSS_13.0 that the standing-wave ratio of above-described embodiment is carried out simulation calculation, knot
Fruit is as shown in Figure 10.
1.2 utilize business simulation software HFSS_13.0 that the axle ratio of above-described embodiment is carried out simulation calculation, result
As shown in figure 11.
2, simulation result
With reference to Figure 10, with standing-wave ratio less than 2 as standard, the impedance bandwidth of antenna is 0.98GHz～2.05GHz,
Relative bandwidth is 70.6%.
With reference to Figure 11, with axle than less than 3dB as standard, the axial ratio bandwidth of antenna is 1.04GHz～2.06GHz,
Relative bandwidth is 65.8%.
The antenna entirety section height of the present embodiment is 19.2mm, relative to mid frequency 1.52GHz is
0.097λ。
Above simulation result illustrates, inventive antenna has preferably on the premise of section height is less than 0.1 λ
Impedance bandwidth and axial ratio bandwidth.
Claims (7)
1. a low section ultra broadband circular polarized antenna based on EBG structure, including antenna element, its feature
It is: described antenna element, uses cross dipole antenna (2), be used for widening frequency band, this crossed dipoles
In the EBG structure (1) that antenna (2) side of being inserted under is arranged, being used for realizing low section, described EBG ties
The lower section of structure (1) arranges meritorious point of phase shifter (3), is used for realizing circular polarisation, described EBG structure (1)
Lower surface and merit divide the phase shifter upper surface of (3) to fit.
Low section ultra broadband circular polarized antenna based on EBG structure the most according to claim 1, it is special
Levying and be: described EBG structure (1), including first medium plate (11), its upper surface is just being printed with n × n
Square or circular metal patch (12), lower surface is printed with metal floor (13), in this EBG structure (1)
Center be provided with cross crotch, be used for inserting cross dipole antenna (2).
Low section ultra broadband circular polarized antenna based on EBG structure the most according to claim 1, its
It is characterised by: described cross dipole antenna (2), including radiating element (21) and feed element (22),
Described radiating element (21) includes four horizontal dipoles (211), and described feed element (22) includes second Jie
Scutum (223) and the 3rd dielectric-slab (224), this two dielectric-slabs (223,224) square crossing, described
Four horizontal dipoles (211) are fixed on the upper end of two dielectric-slabs (223,224).
Low section ultra broadband circular polarized antenna based on EBG structure the most according to claim 3, its
Being characterised by: described second medium plate (223), its lower edge center is provided with inverted U groove, should
The one side of second medium plate (223) is printed with the first feeder line (221), and another side is printed with two rectangular metal
Sheet (225)；Described 3rd dielectric-slab (224), its upper end-face edge center is provided with U-type groove, and this is years old
The one side of three dielectric-slabs (224) is printed with the second feeder line (222), and another side is printed with two rectangular metal sheet
(225)；Described first feeder line (221), the second feeder line (222) and rectangular metal sheet (225), respectively shape
Become inverted L shape structure, be used for realizing couple feed；The inverted U groove and the 3rd of described second medium plate (223)
The U-type groove of dielectric-slab (224) is coincide.
Low section ultra broadband circular polarized antenna based on EBG structure the most according to claim 3, its
Being characterised by: described horizontal dipole (211), using symmetrical structure, this horizontal dipole (211) passes through rectangle
Sheet metal (225) is connected with metal floor (13).
Low section ultra broadband circular polarized antenna based on EBG structure the most according to claim 4, it is special
Levy and be: described first feeder line (221) and the second feeder line (222), all use composite microband line structure, should
Composite microband line structure is formed by connecting by two sections of microstrip lines of width respectively D4 and D5, and wherein, width is
The microstrip line of D5 is converted into inverted U, and D5 ＞ D4.
Low section ultra broadband circular polarized antenna based on EBG structure the most according to claim 1, its
Being characterised by: described merit divides the phase shifter (3), including the 4th dielectric-slab (31), its lower surface is printed with Weir
The gloomy power splitter of gold (33) and 90 ° of phase shifters (32)；This merit divides the phase shifter (3) to paste with metal floor (13)
Close, form ground structure altogether；Described 90 ° of phase shifters (32), its first output port (321) with through metal
Second feeder line (222) in the upper gap arranged, floor (13) connects, the second output port (322) with pass
First feeder line (221) in the upper gap arranged of metal floor (13) connects.
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| CN201610536573.5A CN106025560A (en) | 2016-07-08 | 2016-07-08 | EBG structure based low profile ultra-wideband circularly polarized antenna |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654526A (en) * | 2016-11-25 | 2017-05-10 | 北京航空航天大学 | Lower-specific absorption rate circular polarization conformable antenna and manufacturing method |
| WO2018121256A1 (en) * | 2016-12-30 | 2018-07-05 | 深圳超级数据链技术有限公司 | Low profile antenna |
| CN110148829A (en) * | 2019-03-29 | 2019-08-20 | 西安电子科技大学 | A kind of broadband low section dual polarization cross dipole antenna based on the side annular surface AMC |
| CN111129778A (en) * | 2018-10-30 | 2020-05-08 | 华为技术有限公司 | Wide-beam circularly polarized antenna and array antenna |
| EP3539179A4 (en) * | 2016-11-09 | 2020-05-27 | Tongyu Communication Inc. | Dual-band radiation system and antenna array thereof |
| CN111403907A (en) * | 2020-03-23 | 2020-07-10 | 西安电子科技大学 | Broadband low-profile circularly polarized antenna based on asymmetric dipole |
| CN115117635A (en) * | 2022-07-05 | 2022-09-27 | 西安电子科技大学 | Circular polarized antenna based on AMC structure |
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| EP3539179A4 (en) * | 2016-11-09 | 2020-05-27 | Tongyu Communication Inc. | Dual-band radiation system and antenna array thereof |
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| CN111403907A (en) * | 2020-03-23 | 2020-07-10 | 西安电子科技大学 | Broadband low-profile circularly polarized antenna based on asymmetric dipole |
| CN111403907B (en) * | 2020-03-23 | 2021-05-04 | 西安电子科技大学 | Broadband low-profile circularly polarized antenna based on asymmetric dipole |
| CN115117635A (en) * | 2022-07-05 | 2022-09-27 | 西安电子科技大学 | Circular polarized antenna based on AMC structure |
| CN115117635B (en) * | 2022-07-05 | 2023-10-17 | 西安电子科技大学 | Circular polarization antenna based on AMC structure |
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